Tsis ntev los no, pab pawg ntawm Yang Shanglu, tus kws tshawb fawb ntawm Laser Intelligent Manufacturing Technology Research thiab Development Center ntawm Shanghai Institute of Optics thiab Precision Machinery, Suav Academy ntawm Sciences,tau ua tiav tshiab hauv laser vuamntawm Ni-28W-6Cr nickel-raws li high-temperature alloy, ib yam khoom siv rau tiam plaub reactors-molten- ntsev reactors. Qhov kev tshawb fawb no yog thawj zaug siv high-power fiber laser vuam tshuab rau Ni-28W-6Cr alloy thiab siv high-speed lub koob yees duab technology los soj ntsuam cov yam ntxwv ntawm lub laser vuam thermal cracking dynamic cracking cwj pwm ntawm no alloy thiab elucidate lub cracking mechanism. Cov txiaj ntsig kev tshawb fawb tau luam tawm hauv Phau Ntawv Xov Xwm ntawm Cov Khoom Siv Tshawb Fawb thiab Tshuab (JMRT) nyob rau hauv lub npe ntawm Dynamic laser vuam kub tawg tus cwj pwm thiab cov txheej txheem ntawm cov khoom siv tshiab Ni-28W-6Cr alloy rau cov ntsev molten reactor. Phau ntawv Journal of Materials Research thiab Technology.
Ni-28W-6Cr high-temperature nickel-based alloy is a new structural material designed for China's new generation of high-temperature molten salt reactors (>850 degree), nrog rau qhov kub thiab txias tsis kam thiab tiv thaiv molten ntsev corrosion zog. Vim lub siab alloying qib ntawm no alloy, nws yog li no tsis tshua muaj siab vuam kub tawg rhiab heev, uas ua rau muaj kev hem thawj rau kev ruaj ntseg ntawm welded pob qij txha thiab cov qauv. Txhawm rau txhim kho lub laser vuam zoo ntawm Ni-28W-6 Cr alloy thiab txhawb nqa engineering daim ntawv thov ntawm nuclear zog, nws yog ib qho tsim nyog yuav tsum tau ua sai sai rau kev tshawb fawb txog cov thermal cracking cwj pwm thiab muaj feem cuam tshuam ntawm laser vuam ntawm Ni-28W-6Cr high-temperature npib tsib xee-raws li alloy, thiaj li yuav daws tau qhov teeb meem ntawm thermal tawg ntawmlaser vuam ntawm alloylos ntawm elucidating lub cracking mechanism.
Cov pab pawg tau siv 10,000-watt laser ua chav tsev, ua ke nrog cov cuab yeej siv lub koob yees duab ceev, los tshuaj xyuas tus cwj pwm tsis zoo ntawm Ni-28W-6Cr alloy laser vuam kub tawg, thiab tau txais kev sib raug zoo ntawm hom, tus lej, qhov loj me, thiab kev nthuav dav tus cwj pwm ntawm cov kab nrib pleb kub thiab lub zog laser; qhia meej txog qhov cuam tshuam ntawm qhov kub tawg 'sprouting thiab expansion (laser txheej txheem tsis, elemental segregation, nag lossis daus theem, thiab kev ntxhov siab, thiab lwm yam), thiab ces elucidated lub mechanism ntawm kub tawg nyob rau hauv laser vuam ntawm alloys tau clarified. Qhov kev ua haujlwm no tsim lub hauv paus rau kev tswj hwm lub laser vuam thermal tawg ntawm Ni-28W-6Cr alloy, paub txog qhov tsis xws luag-dawb laser vuam thiab tsim cov hlau, thiab txhawb kev tsim kho cov txheej txheem tshiab molten ntsev reactors.
Kev tshawb fawb ua haujlwm tau txais kev txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj raws li Youth Science Foundation Program thiab National Key Research thiab Development Program ntawm Tuam Tshoj.
(a) Dynamic cracking cwj pwm ntawm laser-welded Ni-28W-6Cr alloy, (b) Microstructure ntawm laser-welded kub tawg hauv Ni-28W-6Cr alloy .
Cov txiaj ntsig ntawm EBSD tsom xam ntawm laser-welded thermal cracking ntawm Ni-28W-6Cr alloy: (a) solidification cracking, (b) liquefaction cracking.
